Blue Black Image Carbonless Copy Paper for Invoice Book consists of sheets of paper that are coated with micro-encapsulated dye or ink or a reactive clay. The back of the first sheet is coated with micro-encapsulated dye (referred to as a Coated Back or CB sheet). The lowermost sheet is coated on the top surface with a clay that quickly reacts with the dye to form a permanent mark (Coated Front, CF). Any intermediate sheets are coated with clay on top and dye on the bottom (Coated Front and Back, CFB). Buy Blue Black Image Carbonless� Copy Paper for Invoice was first produced by the NCR Corporation, applying for a patent on June 30, 1953. Formerly, the options were to write documents more than once or use carbon paper, which was insert between the sheet being write upon and the copy. Carbonless paper was use as business stationery requiring one or more copies of the original, such as invoices and� receipts. The copies were often paper of different coors (e.g., white original for customer, yellow copy for supplierâ??s records, and other colors for subsequent copies). Stationery with carbonless copy paper can be supply collate either in pads or books bound into sets, or as loose sets, or as continuous stationery for printers designed to use it. We at Cosmotech Paper LTD also supply Duplex Board Paper, Art Paper Boards, Writing & Printing Paper, Mondi Rotatrim Copy Paper, A4 COPIMAX â?? 70/75/80 GSM, Color Paper, Paper One Copy paper A4 80Gsm, Chamex Copy Paper A4 80GSM, Chamex Copy Paper A4 80GSM, Xerox Multipurpose Copy Paper, Copy / Laser Paper A4 80GSM and Newsprint Paper 45gsm, 42gsm, 48.8gms, 52gsm Rolls & Sheets.